1
Regulation - Estimate of Radioactivity Total Activity in Material at Rangehead -
September 2001
Estimate of Total Activity of Material at Rangehead, based on concentrations found during the Dickson studies
226Ra
Uranium and
Parameter
U Bq
Th
210Pb
230Th
Notes
Bq
Thorium chain
Concentration
These concentrations based on the
(Bq/kg)
basic statistics of the datum obtained
during the Dickson studies
mean
281
207
34
358
655
4432
standard error
25
20
5
34
94
369
Activity in 2.7kiloton
The mass is based on the 10,000
(Bq)
drums each with 275kg (ANSTO
RELEASED
mean
8.E+08
6.E+08
9.E+07
1.E+09
2.E+09
1.2E+10
measurements)
standard error
7.E+07
5.E+07
1.E+07
9.E+07
3.E+08
1.E+09
Activity Exemption
The exemption level is prescribed in
Levels (Bq)
1.E+04
1.E+04
1.E+03
1.E+04
1.E+04
Not applicable
the ARPANS Regulation
Activity (Units: No. of
These values are calculated in
Exemption Levels)
accordance with Regulations 6 and 38.
mean
7.6E+04 5.6E+04 9.1E+04 9.7E+04 1.8E+05
5.2E+05
standard error
8.7E+02
9.6E+02
1.4E+02
9.6E+02
1.4E+03
4.3E+03
BY
Concentrations in CSIRO Rangehead Material found during the Dickson studies
Uranium and
U 226Ra Th 210Pb 230Th
Concentration (Units: Exemption
Sample
Thorium chain
ARPANSA
Bq/kg
Bq/kg
Bq/kg
Bq/kg
Bq/kg
Levels)
Bq/kg
148
168
315
712
545
14023
25347
14.2
143
708
417
477
721
9388
21651
9.6
114
1287
1185
221
2050
4346
24968
4.8
147
688
1703
211
2947
4138
28059
4.6
8883
879
1438
209
2488
4102
25797
4.5
803
754
1069
206
1850
4049
21093
4.4
9710
740
652
146
1128
2873
14591
3.1
7094
332
1356
115
2345
2253
19897
2.6
9713
826
468
116
810
2270
11970
2.5
9654
1045
1199
99
2075
1931
20521
2.4
UNDER
116
994
459
95
793
1859
11918
2.1
8304
46
48
103
84
2011
3763
2.0
826
1340
164
88
284
1716
9791
2.0
9448
588
605
77
1046
1496
11378
1.7
9656
330
134
76
232
1479
5054
1.6
212
560
589
69
1019
1341
10860
1.6
9696
83
93
75
161
1456
3575
1.5
9695
1826
1664
43
2879
844
27205
1.5
FOI
9714
879
275
62
475
1218
8430
1.4
9709
547
471
58
815
1123
9160
1.3
9450
293
649
55
1123
1068
10052
1.2
9452
528
875
48
1513
930
13308
1.2
2650
1505
159
44
275
845
9081
1.2
FEBRUARY
2699
986
890
39
1539
761
15053
1.1
115
331
494
49
855
944
8282
1.1
9653
268
349
48
603
936
6389
1.1
831
1275
72
40
124
774
7073
1.0
9451
290
302
47
523
918
5934
1.0
9694
591
655
41
1133
797
10897
1.0
2688
454
345
43
596
845
6952
1.0
9655
405
353
43
611
844
6850
1.0
2698
276
483
44
835
846
7789
1.0
830
496
546
41
945
793
9296
1.0
211
225
428
43
740
841
6960
1.0
113
1493
105
31
181
601
8057
0.9
8307
229
391
40
676
779
6465
0.9
2019
7784
367
413
39
714
747
7216
0.9
97
891
121
35
209
671
5936
0.9
7785
78
183
41
316
792
3556
0.8
827
192
100
40
173
771
3053
0.8
9431
321
80
38
138
744
3307
0.8
7092
238
499
35
864
676
7562
0.8
7612
1501
69
25
119
485
7511
0.8
8306
812
125
31
216
606
5563
0.8
7786
238
250
36
433
695
4804
0.8
7787
1234
85
26
147
508
6660
0.8
9044
271
327
33
566
644
5720
0.8
9449
1138
204
25
353
484
7571
0.7
9440
410
690
28
1195
533
10177
0.7
120
183
292
33
504
632
4955
0.7
272
80
56
35
97
672
1966
0.7
9416
303
158
32
273
610
3901
0.7
2682
350
231
30
400
586
4874
0.7
2
Regulation - Estimate of Radioactivity Total Activity in Material at Rangehead -
September 2001
9400
616
605
25
1047
471
9956
0.7
1760
197
322
30
557
588
5281
0.7
8286
278
258
30
446
582
4881
0.7
9443
202
89
32
154
623
2750
0.7
9693
259
131
30
226
585
3387
0.7
9664
104
296
30
512
584
4614
0.7
9680
369
164
28
284
549
4143
0.7
8221
533
35
28
60
536
3335
0.7
409a
1592
19
17
32
332
7082
0.7
9670
704
74
25
128
480
4373
0.6
7061
528
103
26
178
500
4026
0.6
9423
394
225
26
388
501
4849
0.6
9662
344
199
26
344
506
4369
0.6
RELEASED
409b
13
54
31
93
590
1549
0.6
9408
289
47
27
81
524
2478
0.6
9457
106
112
28
194
541
2500
0.6
8222
249
162
26
281
494
3563
0.6
9661
142
182
26
314
496
3355
0.6
8220
290
341
23
591
438
5650
0.6
9417
83
221
26
382
497
3563
0.6
2938
107
126
26
217
505
2602
0.6
9419
662
206
20
356
375
5518
0.5
9449
290
190
23
329
444
3966
0.5
2937
260
210
23
363
441
4056
0.5
2681
207
230
23
398
441
4074
0.5
BY
84
76
141
25
245
476
2610
0.5
9035
459
304
20
527
375
5814
0.5
9458
136
111
24
192
453
2474
0.5
128
171
184
22
319
428
3399
0.5
ARPANSA
818
126
129
23
223
432
2601
0.5
9403
159
372
20
644
380
5382
0.5
9439
348
171
20
296
374
3877
0.5
7614
336
77
20
132
391
2798
0.5
7615
284
178
20
307
381
3705
0.5
9411
124
187
21
323
404
3201
0.5
2695
255
120
20
207
389
2952
0.5
8285
447
122
17
212
326
3656
0.4
9456
239
143
19
247
359
3098
0.4
9410
134
87
20
151
386
2103
0.4
2692
58
119
21
207
393
2169
0.4
UNDER
9420
157
188
19
325
354
3269
0.4
9422
297
106
18
184
341
2900
0.4
4504
127
287
18
497
342
4247
0.4
9663
766
46
14
80
257
3978
0.4
9448
102
155
19
268
358
2685
0.4
2687
88
187
19
323
353
2981
0.4
7612
66
32
20
56
379
1202
0.4
225
119
93
18
162
349
2055
0.4
1979
35
39
18
68
338
1092
0.4
FOI
7615
121
210
18
364
337
3349
0.4
9456
149
176
18
305
337
3080
0.4
1208
133
86
18
148
336
2002
0.4
228
59
76
18
132
333
1600
0.4
FEBRUARY
5996
80
51
17
89
332
1401
0.4
9418
158
97
17
167
324
2208
0.4
9669
117
225
17
390
318
3475
0.4
7614
81
160
16
277
309
2585
0.4
875
96
77
16
133
304
1712
0.3
98
49
67
16
116
302
1410
0.3
5992
84
101
16
175
302
1931
0.3
8152
97
147
16
255
299
2493
0.3
433
203
99
16
172
298
2380
0.4
9046
77
76
16
131
296
1605
0.3
9402
341
77
16
134
294
2680
0.4
5997
89
83
16
143
294
1733
0.3
9457
245
115
15
199
293
2715
0.4
2019
9718
62
110
15
191
290
1927
0.3
101
91
97
15
169
290
1896
0.3
2061
82
54
15
94
289
1377
0.3
9441
121
84
15
145
288
1865
0.3
2708
87
201
15
347
285
3031
0.3
7058
53
79
15
137
284
1532
0.3
1757
82
100
15
172
282
1872
0.3
8223
179
95
15
165
281
2214
0.3
8287
95
281
14
486
273
3942
0.3
6032
122
106
14
183
269
2081
0.3
1758
271
54
14
93
267
2094
0.3
5976
90
132
14
229
267
2248
0.3
9401
113
223
14
387
266
3362
0.3
2063
152
54
14
94
262
1620
0.3
7517
47
98
14
169
260
1682
0.3
7085
64
83
13
144
252
1572
0.3
802
122
208
13
360
249
3200
0.3
820
68
47
13
81
243
1171
0.3
3
Regulation - Estimate of Radioactivity Total Activity in Material at Rangehead -
September 2001
7613
98
66
13
114
242
1502
0.3
9678
132
205
13
355
241
3197
0.3
3387
77
135
13
233
240
2183
0.3
817
103
48
13
83
235
1314
0.3
5078
126
125
12
216
231
2253
0.3
5980
99
132
12
229
229
2226
0.3
2046
55
72
12
124
223
1364
0.2
2045
82
68
12
118
222
1433
0.3
94
121
121
12
209
219
2174
0.3
8284
69
70
11
122
211
1387
0.2
5997
140
85
11
147
208
1835
0.3
8881
102
79
11
136
206
1605
0.2
9033
92
48
11
83
204
1218
0.2
RELEASED
2062
77
62
11
107
202
1314
0.2
2047
90
114
11
196
195
1931
0.2
6016
79
46
10
79
190
1122
0.2
7516
79
40
10
69
188
1048
0.2
9701
155
144
10
250
186
2519
0.2
806
155
65
10
112
186
1631
0.2
5975
158
25
10
43
186
1196
0.2
5991
173
158
10
273
183
2739
0.2
2621
207
62
10
107
182
1799
0.2
2018
58
54
10
93
180
1111
0.2
9430
64
54
10
94
176
1132
0.2
2022
23
55
10
95
175
979
0.2
BY
5998
180
160
9
276
165
2763
0.2
9428
47
32
9
55
163
795
0.2
5993
21
42
9
72
162
802
0.2
9045
78
99
9
171
162
1670
0.2
ARPANSA
829
100
72
9
125
159
1453
0.2
6031
140
27
9
47
158
1109
0.2
2021
101
43
9
74
158
1127
0.2
9677
58
31
9
54
158
822
0.2
9686
30
35
8
61
153
748
0.2
9074
76
54
8
94
152
1148
0.2
807
55
42
8
72
149
915
0.2
1980
48
19
8
32
146
625
0.2
9685
293
17
8
30
138
1582
0.2
2017
67
46
8
80
136
995
0.2
876
22
42
8
72
136
767
0.1
UNDER
8305
76
64
7
110
134
1227
0.2
7101
40
52
7
91
132
954
0.1
5994
34
22
7
37
127
574
0.1
9687
72
37
7
64
125
892
0.1
6024
54
26
7
45
125
702
0.1
9679
25
15
7
26
123
457
0.1
2617
60
104
7
181
122
1599
0.2
6026
35
22
7
38
122
577
0.1
5995
21
20
7
35
121
499
0.1
FOI
9704
108
7
7
11
118
688
0.1
5061
23
16
6
28
115
455
0.1
2622
62
54
6
94
111
1031
0.1
6017
28
30
6
51
109
614
0.1
FEBRUARY
5979
20
32
6
55
109
607
0.1
6015
18
22
6
39
97
476
0.1
6023
56
11
5
20
84
485
0.1
7518
19
14
5
24
77
354
0.1
6025
8
10
5
16
77
261
0.1
6018
15
8
4
14
68
260
0.1
9702
16
6
4
10
63
231
0.1
9688
6
3
3
6
41
128
0.0
2019
